Surface-measuring machine particularly intended for the measurement of leather



Aug. 21, 1923. 1,465,533

H. THUN SURFACE MEASURING MACHINE, PARTICULARLY INTENDED'FOR THE MEASUREMENT OF LEATHER Filed June 16. 1922 2 Sheets-Sheet N 2. ml

Aug. 21, 1923. 1,465,533

H. THUN SURFACE MEASURING MACHINE, PARTICULARLY INTENDED FOR THE MEASUREMENT OF LEATHER Filed June 16. 1922 2 Shuts-Sheet 2 Patented Aug. 21, 1923.

- entrangm I new? earner j ra se ii'nniunivn anon, on nss'nn, rit-tinny, Ass enon .t' o nninijsirnni r immensE'LiisoHeF'ir; or ns'snn-on-rnn-nunn; Genuine SURFACE-MEASURING MACHINE ren rxennentr INTENDED FOR THE MEASUREMENT or LEATHER.

Applieation filed June 16, 1922. Serial No. 568,804.

To all 91 7101 11 may concern:

Be it known that I, HERMANN THUN, re-

siding atEssein Germany', a citizen of the German Republic, have invented a certain new and useful Improvement in Surface htieasuring for the Measurement'of Leather, of which the following is a specification.

I This invention relates to-surface measuringmachines, particularly intended for the measurement of leather, of the class such as described in the 112- S. Patent No. 1,402,118 of January 3, 19 22, and has for its object to simplify these machines ast'o the members serving for the elimination of the error. of

thickness} On thedrawings anembodimentof the subject-mutter of the invention is diagra-n'iiiiatioally sh'own, by way of example,

Fig. 1 showing a section through the ma chine, the parts the invention is notdeal ing with being omitted,

Fig. 2 showing atop view of Fig; 1,-

Fig; 3 showing the section on line-3 3 of Fig. 1, seen from above, 1 -i F 1g. 4 a section similar to- F 1g. 1, with the parts ina; different position,

Fig. 5:ShW]l1g details of Fig. 1 on an enlarged scale.

Referring now to these drawings,- A; de-i notes the driving roller which,jupon a measuring operation, ispermanently rotating-iii clockwise direction, and on which bear a number of contact rollers 'Blocated besides one another. mounted for rotation on theshorter arm of 7 an unequally armed crank lever D pivotally,

mounted on a fixedaxle G. The longer arm of the lever D carries a" set-screw'E-against which the shorter arm of a second unequally armed lever G abuts under the action-of a spring 1*. .The longer arm .offthe lever G has-mounted on.it,.by means of- ,a pivot-pin 91, a ratchet pinion H. This pinionH faces a'ratchet whee-1 K in; a-inanner so astoen.- gage it upon a rotation of the lever G' in counter-clockwise direction, but, with the positioi of the partsshown in Fig 1, to be just still out of engagement with the wheel V The pinion His further rigidly connected to a disc H havingtwo diametrically dis posed engaging pins 1%, see F igs; 1 3 and 4; These pins engage 1ir two'rad1a1ly arranged Machines Particularly Intended- Each contact roller 13 is recesses m of a disc M located between the pinion :1 and the respectivev contact roller;

B, 3'. J The disc M fu'rther shows two radially arranged recesses m which are staggered by 90 with respect to the recesses 722 Two engag ng pins Z7 fixed on the respective contact-roller B, project into the recesses m Through the intermediary of these cross.

disc's M tliep'inions. H thus are coupled to their respective contact rollers B in a manner so as to allow 'a rotation of a contact roller B to be'transmitted to the respective pin-ionH but to 'allow, at the same time, these two parts to displace independently of each otherperpendicularly,totheir axis of rotation.

mounted OliifiSllELfi c? which is positively connected .to the driving roller A by -mefans off'a toothed-gearing 7: N P 0 a see Fig. 1, and is rotated therefore, by the roller A,

l permanently in counter-clockwise direction,

7 V 70 The ratchet wheel K is freely; rotatably when a'm'easuring operation takes place; The f 7' ratchet wheels are each rigidly connected to aipnlley k whichis" connected, on the one hand, to theish'aft In? byineans of a friction clutch, Fig! 2, and, i on the other hand,

throu h: a band]: in a manner known er se,- to the" scale dial (not shown) of an add-"i ing mechanismg-By a weight (likewise not; shown) acting upon the scale dial, a trac tion inethe direction of'arrow m,jFig. 1,.is

permanently: exerted on the band The ratchet wvheel.'K.is prevented from rotating under the-actionof said traction, in the positionof the "parts shown in Fig. 1,-the position of rest ofthemdehine-by a fixed stop a qagainst which abuts a. stop pin 70 previded on the ratchet wheelK. VVhen a meas-' ifirestslone arm, T, of a crank lever T'T pivoted on the lever D,-under the action of aweiglit t which is. carried by the other "-icight 2% tends to rotate the ratchet in clockwise direction thrmigh the the lever it E and the pawl position of the parts shown in if already by the tact that the weight t rests 1 the lever D.

measuring a piece of leather W :e is ted over the driving roller A,

. contacttherewith. to be lifted off so that the respective levers D .iter-clwkwise direction. The apant levers (i come to follow this rota- =nder the action of the springs F so the respective ratchet pinions ll which o in (.OltnlQT-(IlOClflVlSG directiolncome are the corresponding wheels I: fac- Ewing to the fact that the pinions Z mounted on the longer arm of the levers t and the contact rollers B on the u the levers D thisengagement already when the contact rollers ted the roller A. to a slight ex- 1:5 The wheels T against the action of theabove-men- This rotation is transmittedthrough ad ng mechanism onto the scale dial. the urning of the lever Dtaking when the respective contactroller B d. the arm T of the lever T T tends tate the lever R in clockwise. direcand thus to shift the pawl Qin the'dio' y. and. theretoreQto rotate in clockwise direct-ion. The

. h e er. has been positively con- V to the driving roller it im o te the contact roller B has e l rotated l he roller A likewise in clock- This rotation is a slower the rotation aimed at by the pawl ow a positive connection would existthe D and the lever R R a Q would occur. But owing to the in- .IV irection.

ternosino; oil the lever T T the weight t comes to be lifted oft. the lever D; upon rotatim of this'latter. in the moment the arm T o?" the lever T T strikes the curved portion 0"? the sur'tace 1 and the pawl Q follows the rotation of the wheel K without in hienri the measurement in any way; The corn. .ne of the surface r is so chosen id causes the contact rollers B en now come to be rofriction clutch. in cloclnvise'direo.

is of the cross disc M and ted. and the wheel K is therei that the weight 6 comes to rest upon the lever D again as soon as the wheel K along with the pawl Q, has rotated by an amount corresponding to the error of thickness.

Since the lever D has come to rest already tive lovers 1 T come likewise to assume their initial position shown in Fig. 1. The

levers 13 tend to follow this movement butare still incapable of doing so, as they rotate hardly, as above mentioned. Thus they first retain their position of Fig. 4t.

P -hortly be'tore the contact rollers B come to'toueh the driving rollerA again, the pinions H come out of engagement with the wheels K. In this moment the scale dial of the adding mechanism is indicating a value which deviates from the measured area by the amount corresponding to the error of thickness and, besides, to the so-called tootherror.

As soon as the connection between the pinions and the wheels K has been released. the wheels come to be rotated in counter-clockwise direction by the shaft through the intermediary of the friction clutches and of the weight acting upon the scale dial. When this takes place the pawls Q. are shittedjin a direction opposite toarrow and the levels T T are correspondingly rotated. These movement-s continue until the plane portion ofthe surfaces r come to touch again the arm T 'ot the levers T'T this arm preventing aflgturther movementp As it will be seen at once, at this moment, the wheels K along with the scale dial have been rotated back exactly by the amount Tt'may still be noted that the surfa'ces'r? preferably are curved in such a waythat besides the error of thickness, the tootherror is likewise taken account of.

Claims: 1. A. measuring machine of the class described tor use in connection with an 'indieating apparatus. comprismg a driving roller engaojing the material to be measured. contact rollers adapted to be lifted by the material to be measured. means for operating the indicating apparatus. means operable 1 by said contact rollers for causing the driving means of the indicating apparatus to be actuated in the measuring direction, means operable by said contact rollers for allowing the indicating apparatus to be moved in the opposite direction a two-part locking lllQCllilIliSlll associated with each or said con tact rollers, one part of said mechanism being in connection with the indicating apparatus and the other part thereof being in connection with said contact roller, and a yielding means interposed between said contact roller and the appurtenant last named part of said locking mechanism.

2. A measuring machine of the class described for use in connection with an indicating apparatus, comprising a driving roller engaging the material to be measured, contact rollers adapted to be lifted by the material to be measured, means for operating.

the indicating apparatus, means operable by said contact rollers i'or causing the driving means of the indicating apparatus to be actuated in the measuring direction, means operable by said contact rollers for allowing the indicating apparatus .to be moved in the opposite direction, a pawl and ratchet mechanism associated with each of said contact rollers, the ratchet member of said mech anism being in connection with the indicating apparatus and the pawl thereof being in connection with said contact roller, and a:

yielding means interposed between said contact roller and the appurtenant pawl.

'3. A measuring lIliLClliilG'Of the class described for use in connection with an indicating apparatus, comprising a driving roller engaging the material to be ineas-' ured, contact rollers adapted to be lifted by.

the material to be measured, means for operating the indicating apparatus, meansoperable by said contact rollers for causing the driving means of the indicating apparatiis to be actuated inthe measuring direction, means operable by said contact rollers for allowing the indicating apparatus to be moved in the opposite direction, a pawl and ratchet lGCllZLIilSIIi associated with each of said contact rollers, a double-armed lever connected to each of said contact'rollers and; pivotallv carrying the pawl of said mechanism, the ratchet memberthereof being in connection witli the indicating apparatus,"

and a yielding means interposed between said contact roller and theappurtenant double-armed lever.

i. A measuring machine of the class de- I scribed tor use in connection with, an indieating apparatus, comprising a driving roller engaging the material to be measured, con-: tact rollers'jadapted to be lifted by the nate.-

rial; to be n easured,'ineans l'or operatingf the indicating apparatus, ineansoperable by said contact rollers lfor causing the driving means of the indicating apparatus tobe.

actuatedin the measuring direction, means operable by said contact rollers 'ior allow ing the indicating apparatus to'bemoved in the opposite direction, a pawl-and ratchet mechanism associated with each or saidcontact rollers, a double-armed lever connected, to each of sa d contact rollers and pivotally carrying the pawl of said mechanism, the ratchet member :thereor being in connection with the nd cating apparatus, a double armed weight lever interposed between said con'tact roller and the 'appurtenant first V named double-armed lever. V

5. A measuring machine or the class de scribed for use in connection witliranindi-" 'cating apparatus, comprising a driving roller engag ng the material to be measured,

Contact rollers adapted to be lifted bylthe' allowing the indicating apparatus. to be moved in the opposite direction, a pawl and ratchet mechanism associated with each of said contact rollers, a hardlyrotatable dou ble-armed lever'connected to each of said' contact rollers and pivotally carryingthe pawl of said mechanism, the ratchet member thereof being in connection with the indicating apparatus, and a yielding means interposed between said contact roller and appurtenant double-armed lever.

HERMANN THUN.

the 

